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magic.DetectFormat returns an imagerequest.Format. ValidateMagicBytes returns the format it checked against the upstream Content-Type. The cache reads a cached source's format from its file's first bytes, as it reads a variant's. The proxy hands the format to Process. Process refuses a format that is not a source format, and input libvips would load with another loader, such as an SVG passing as AVIF. Format.MIMEType declares each MIME string once, and the fetcher, the cache's variant read and the Accept matching use it. magic.MIMEType, magic.ImageFormat, MIMEToImageFormat, magic's SVG detection, detectFormat, formatFromString, FormatToMIME and Result.InputFormat are gone. Model: opus-5-5
97 lines
2.9 KiB
Go
97 lines
2.9 KiB
Go
package imageproxy
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import (
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"errors"
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"os"
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"testing"
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"sneak.berlin/go/pixa/internal/imagerequest"
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)
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// TestProxy_Get_ServesCachedVariantOfNegativeCachedURL caches a variant of
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// the test photo, then keeps a failed fetch of the photo's URL in the negative
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// cache, as a failed fetch for another variant does once the source has been
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// evicted. The cached variant is still served, and a variant not in the cache
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// is made from the cached source. Once the source is evicted, a variant not in
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// the cache needs a fetch and is refused.
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func TestProxy_Get_ServesCachedVariantOfNegativeCachedURL(t *testing.T) {
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t.Parallel()
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svc, fixtures := setupTestProxy(t)
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resp, err := svc.Get(t.Context(), photoVariant(fixtures, 85, imagerequest.FitCover))
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if err != nil {
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t.Fatalf("Get() first request error = %v", err)
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}
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_ = resp.Content.Close()
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err = svc.cache.PutFailure(t.Context(),
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photoVariant(fixtures, 85, imagerequest.FitCover).Source)
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if err != nil {
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t.Fatalf("PutFailure() error = %v", err)
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}
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resp, err = svc.Get(t.Context(), photoVariant(fixtures, 85, imagerequest.FitCover))
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if err != nil {
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t.Fatalf("Get() of the cached variant error = %v", err)
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}
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_ = resp.Content.Close()
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if resp.CacheStatus != CacheHit {
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t.Errorf("cached variant CacheStatus = %q, want %q",
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resp.CacheStatus, CacheHit)
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}
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resp, err = svc.Get(t.Context(), photoVariant(fixtures, 40, imagerequest.FitCover))
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t.Logf("Get() of a variant made from the cached source: error = %v", err)
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if err != nil {
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t.Fatalf("Get() of a variant made from the cached source error = %v", err)
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}
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_ = resp.Content.Close()
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source := photoVariant(fixtures, 85, imagerequest.FitCover).Source
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reader, _, _, err := svc.cache.Source(t.Context(), source)
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if err != nil {
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t.Fatalf("Source() error = %v, want the cached source", err)
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}
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_ = reader.Close()
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// Evicts the source as the cache's eviction does: its row, then its file
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_, err = svc.db.ExecContext(t.Context(),
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`DELETE FROM source_content WHERE source_key = ?`, string(source.Key()))
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if err != nil {
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t.Fatalf("deleting the source's row: %v", err)
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}
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err = os.Remove(sourceFilePath(svc, source.Key()))
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if err != nil {
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t.Fatalf("removing the source's file: %v", err)
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}
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_, err = svc.Get(t.Context(), photoVariant(fixtures, 60, imagerequest.FitCover))
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t.Logf("Get() of a variant whose source was evicted: error = %v", err)
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if !errors.Is(err, ErrNegativeCached) {
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t.Errorf("Get() of a variant whose source was evicted error = %v, want %v",
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err, ErrNegativeCached)
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}
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}
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func TestProxy_Get_ReturnsErrorForNegativeCachedURL(t *testing.T) {
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t.Parallel()
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// This test verifies that Proxy.Get() checks the negative cache
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// We can't easily test the full pipeline without vips, but we can
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// verify the error type
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err := ErrNegativeCached
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if !errors.Is(err, ErrNegativeCached) {
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t.Error("ErrNegativeCached should be identifiable with errors.Is")
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}
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}
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